Is Your 2010 Avalanche Experiencing Strange Electrical Issues?
The Body Control Module (BCM) is the central nervous system for your truck’s electronic accessories. It doesn’t control the engine, but it manages nearly everything else—from your power windows and door locks to the interior lights, security system, and instrument cluster. When the BCM starts to fail, it can cause a cascade of frustrating and seemingly unrelated problems. If your truck is acting haunted, with systems malfunctioning randomly, a faulty BCM is the most likely culprit.
This isn’t just an inconvenience; a failing BCM can compromise your vehicle’s security and functionality. Instead of spending a fortune at the dealership for a new module and expensive programming fees, we offer a direct, cost-effective solution. This is a genuine replacement Body Control Module, part number 20815898, which is a direct fit for your 2010 Avalanche Body Control Module and a wide range of other GM vehicles.
From the Diagnostic Bay
We had a 2010 Tahoe come in that was driving the owner crazy. The dome lights would flicker while driving, the radio would randomly shut off, and the power locks would cycle on their own. He’d already replaced the battery and checked the main grounds, but the gremlins persisted. After hooking up our scanner, we saw multiple communication loss codes with various modules, all pointing back to the BCM. We installed one of our VIN-programmed modules, and within 30 minutes, every single issue was resolved. The owner was thrilled to have his truck back to normal without a massive dealership bill.
Symptoms of a Failing BCM
- ✔ Intermittent or non-working power windows, door locks, or mirrors.
- ✔ Erratic behavior from the dashboard gauges or instrument cluster lights.
- ✔ Interior or exterior lights staying on, not turning on, or flickering unexpectedly.
- ✔ The security system malfunctioning, causing the alarm to go off randomly or preventing the engine from starting.
- ✔ Horn honking without input or not working at all.
- ✔ Radio or climate control systems turning on and off by themselves.
- ✔ “Service Stability System” or other warning messages appearing on the dash.
The Simple, Programmed Solution
The biggest challenge when replacing a modern vehicle module is the programming. A BCM from a dealership or salvage yard is essentially a blank slate; it won’t work until it’s programmed to your vehicle’s specific Vehicle Identification Number (VIN) and options. This process requires specialized tools and subscriptions that most DIY mechanics and even some professional shops don’t have.
We eliminate that entire headache. When you purchase this 2010 Avalanche Body Control Module from us, you simply provide your VIN during or after checkout. Our technicians will then flash the module with the latest GM-certified software specific to your truck. This ensures that when the part arrives, it’s ready for a much simpler installation process. It’s a true plug-and-play solution that saves you time, money, and a trip to the dealer.
Post-Installation Procedures
While our programming handles the heavy lifting, some GM vehicles may require one or two simple relearn procedures after the new BCM is installed. These are standard steps to ensure all related systems are properly synced with the new module.
- Airbag System Sync: If your airbag warning light is illuminated after installation, a “Setup SDM Primary Key in BCM” procedure is needed. This syncs the new BCM with the airbag system’s Sensing and Diagnostic Module (SDM) and requires a professional-grade scan tool.
- Brake Pedal Position Relearn: In some cases, a brake pedal position sensor recalibration might be necessary to ensure the brake lights and traction control system function correctly.
Please note: Specific procedures can vary by vehicle. Always consult a factory service manual or a qualified technician for guidance.
Guaranteed Fitment
This BCM, part number 20815898, is a compatible replacement for a vast array of part numbers and fits numerous GM trucks, vans, and SUVs. If your original module has any of the following part numbers, this unit is the correct replacement for you: 10382479, 15093910, 15276271, 15819552, 15872388, 15921352, 20839063, 20935349, 22860591, 25826124, 25847588, 25892622, 25910474, and many more. Restore your vehicle’s full functionality and order today!
Frequently Asked Questions
What does a BCM do on my 2010 Avalanche?
The Body Control Module (BCM) acts as the central computer for your truck’s body electronics. It controls non-engine related functions like power windows, locks, lights, security system, wipers, and the instrument panel.
Do I need to program this module?
No. We handle the programming for you before we ship the part. Simply provide us with your vehicle’s VIN, and we will flash the BCM with the correct software for your specific truck, making the installation process much simpler.
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows our technicians to access the exact factory software and configuration for your vehicle’s specific options. This ensures the replacement BCM works correctly with all the features your truck was built with.
What happens if my airbag light is on after installation?
If the airbag light is on, it means the new BCM needs to be electronically introduced to the airbag system module (SDM). This requires a “Setup SDM Primary Key in BCM” procedure, which must be performed with a professional diagnostic scan tool.
Where is the BCM located on a 2010 Chevy Avalanche?
On the 2010 Avalanche, the BCM is typically located inside the cabin, up under the driver’s side of the dashboard, near the steering column. It is often secured to a bracket and has several large electrical connectors attached to it.